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CHAPTER 4 Traffic Control Issues A confirmed foreign plant or animal disease will most likely require an immediate quarantine radius of several miles. In a rural county, a 3- to 6-mi (5- to 10-km) quarantine radius could involve 10 to 35 vehicle entry and exit points along the quarantine boundary that must be bar- ricaded or manned to control traffic. The following types of vehicles should be controlled, and each type will require different procedures at traffic control points: All vehicles, both agricultural and nonagricultural, entering, exiting, or passing through quar- antined area; Vehicles transporting (legally or illegally) live-stock, poultry or produce; and Emergency response vehicles. While police officers and sheriff's deputies have the most experience with law enforcement road blocks and traffic stops, they are often not aware of the proper quarantine procedures for an agricultural emergency. They may also not have adequate resources and personnel for effec- tive traffic control on the scale necessary for a quarantine that covers over 100 mi2 (259 km2) and that may last 2 months or longer. 4.1 Levels of Traffic Control This guide describes three levels of traffic control that can be used in an agricultural emer- gency. These three levels of traffic control are: Level 1: Traffic check points with cleaning and disinfection stations--Traffic checkpoints prevent the spread of disease by ensuring traffic is controlled and only authorized vehicles are allowed to move in or out of the quarantine area. Level 1 checkpoints are used with the added provision of a station to clean and disinfect vehicles and equipment and to disinfect individuals exiting a quarantine zone. In an agricultural emergency, the quarantine applies directly to plants or animals, but individuals and vehicles may spread the disease if disinfection efforts are not utilized. Level 2: Traffic checkpoints--Vehicles are screened and those related to agriculture are returned to their places of origin or holding sites, or they are allowed to proceed under permit. Level 3: Road closures--Roads are barricaded and all traffic movement is stopped. The Level 1 and 2 traffic checkpoints require substantially more equipment and personnel than the Level 3 road closures, which will generally be the most common type of traffic control used. Generally, at least one law enforcement officer will be needed at each traffic checkpoint. Locations for traffic checkpoints will be determined based on a priority scale that considers traffic 16